0 votes 0 votes Show that $A \times B \neq B \times A$, when $A$ and $B$ are nonempty. unless $A = B.$ Set Theory & Algebra kenneth-rosen discrete-mathematics set-theory&algebra + – Pooja Khatri asked Apr 5, 2019 Pooja Khatri 159 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.